3957742720 has 64 divisors (see below), whose sum is σ = 9766736640. Its totient is φ = 1532021760.

The previous prime is 3957742709. The next prime is 3957742739. The reversal of 3957742720 is 272477593.

3957742720 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (64).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 79902 + ... + 119581.

It is an arithmetic number, because the mean of its divisors is an integer number (152605260).

Almost surely, 2^3957742720 is an apocalyptic number.

It is an amenable number.

3957742720 is an abundant number, since it is smaller than the sum of its proper divisors (5808993920).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3957742720 is a wasteful number, since it uses less digits than its factorization.

3957742720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199533 (or 199521 counting only the distinct ones).

The product of its (nonzero) digits is 740880, while the sum is 46.

The square root of 3957742720 is about 62910.5930666688. The cubic root of 3957742720 is about 1581.7913134276.

The spelling of 3957742720 in words is "three billion, nine hundred fifty-seven million, seven hundred forty-two thousand, seven hundred twenty".